perkins



(No Model.)

.ELEGTROLIER.

Patented Sept21,'1886.'

Invervfior:

N. PETERS, Pholb-Li'hognphnr, \Vaihillglom v30,

(No Model.) v 3 Sheets-Sheet 2. O. G. PERKINS.

ELEGTROLIER.

No. 349,516. Patented Sept. 21, 1886.

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3 Sheets-Sheet 3.

(N0 Modl.)

C. G. PERKINS.

ELEGTROLIBR.

No. 349,516. Patented Sept. 21, 1886.

UNITED STATES PATENT OFFICE. I

CHARLES G. PERKINS, OF NEIV YORK, N. Y., ASSIGNOR TO THE IMPERIALELECTRIC LIGHT COMPANY, OF SAME PLACE.

ELECTROLI ER.

SPECIFICATION forming part of Letters Patent 110,349,516, datedSeptember 21, 1886.

Application filed January 11. 1884. Serial No. 117.125.

To all whom it may concern.-

Be it known that I, CHARLES G. PERKINS,

a citizen of the United States, and a-resident of New York, in thecounty of New York and State of New York, have invented certain new anduseful Improvements in Electroliers, of which the following is aspecification.

My invention relates to a class of wall and ceiling fixtures, commonlycalled electroliers, having arms for holding electric lamps and lampattachments.

In illustrating the first part of my invention I have shown a singletube, which I term the support, carrying metallic tubes in the interiorthereof, which I term conducting tubes. These tubes are held in positionand insulated from each other by means of an insulating material, suchas wood, rubber, fiber, 0r plaster-of-paris. receive a sliding metallicrod split at the upper end and sprung outward, so as to produce afriction on the interior surface of the conducting-rods, therebyinsuring a perfect electrical contact therewith.

In illustrating the second part of my invention I have shown a singletube, which I term the telescopic tube, the upper end of which carries afriction-spring, which spring bears against the exterior surface of thesupportingtube. The lower end of the telescopic tube is provided with ashoulder carrying a unionnut, which engages with screw-threads made onthe neck of a hub. The hub has an annular concaved track on the exteriorthereof corresponding with a like structure made on the under side ofthe annular rim of the case having the lamp and switch holders fixedthereon. These tracks are held one above the other by means of a numberof balls playing within the concaved portions thereof when revolving theportion carrying the lamp and switch holders.

In illustrating the third part of my invention I have shown a block,made of suitable material, held within the above-named hub by means ofscrews. The said block is provided with metallic standard-nuts for thereception of the aforesaid metallic rods. The standardnuts areelectrically connected separately with a metallic ring partly embeddedin the base of the block, said metallic rings engaging with Theseconducting-tubes (No model.)

fiat friction-springs fastened to metallic rings secured to a secondblock of insulating material rigidly fixed to the revolving case namedabove. These rings of the second block of in- 5 sulating material areprovided with metallic projections, which pass through the block ofinsulating material to the base thereof, where they are electricallyconnected with the conductors leading to the lamps.

In the drawings,Figure 1 represents a vertical section showing theprincipal features of my invention. Fig. 1 represents a detail view ofone of the sliding rodsfshowing the split end thereof. Fig. 2 representsan elevation of the exterior. Fig. 3 is a plan of the second block ofinsulating material, showing the flat frictionsprings mounted thereon.Fig. 4 is an inverted plan of the second block. Fig. 5 is a plan of theblock of insulating material secured to the hub Fig. 6, an inverted planthereof. Fig. 7 is a plan of the hub, showing the con cave trackthereon, and partly filled with balls.

Similar letters refer to similar parts throughout the drawings,in-whicha represents the hanger.

bis the supporting-tube containing the tubes 0 c, which are insulatedfrom each other and held in position by plaster-of-paris, d.

e e are the electrical conductors connected with the tubes 0 c.

d d are the metallicrods provided with split ends, and adapted to slideand make frictional contact with the interior surfaces of the tubes 0 c.Said rods are secured to the standard-nuts ff, one of which iselectrically connected with the metallic ring 9'. The standard-nuts f fand metallic rings 9 g are secured to the block of insulating materialh, which is rigidly fixed to the hub '5, provided with the track 70 onthe exterior thereof.

l are the flat metallic springs, each separatcly fastened to metallicrings n, secured to the second block, 0, of insulating material. Saidrings are provided with metallic projecg5 tions 19, which pass throughthe second block to the base thereof, where they are electricallyconnected with the conductors 1 and 2, leading tothe lamps.

s is the revolving case having secured there- ICQ to the arms 8, whichsupport the lamp and switch.

t is the concave track made on the under side of the rim t of the case8. Both the tracks k and t are separated from each other by means ofballs k, over which the track t glides.

u is the telescopic tube carrying the frictionspring u at the upper endthereof, where it is held in position by means of the nut 11.

3 is the shoulder integral with the telescopic tube u, which shouldersupports a union-nut, u, screwed onto the neck4 of the hub i. The upperend of the telescopic tube is also provided with an offset, 1), whichcomes in contact with the annular offset 1)" on the lower end of thesupportingtube I).

5 is a cap adapted to be screwed onto the case 8.

The arms 8 are provided with swivel circuitconnections 8', whereby thelamp may be turned in any position desired. However, I donot claim thisto be a new feature, as I have made application for Letters Patent forthe same some time since. The turning of case sin a horizontal plane ispossible, because of the relative positions of the frictional springsand plates 9 g I, always maintaining the electrical contact, and theelevating and lowering of the electrolier can be accomplished by meansof the split tube and the inclosing-tube.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In combination with an electrolier, a supporting-tube containingmetallic conductingtubes insulated from each other, the conducting-tubesadapted to receive a metallic rod provided with means on the upper endthereof adapted to produce frictional contact with the interior of theconducting-tubes, both tubes and rods forming a part of thecircuit-connections of the electrolier.

2. In combination with an electrolier, a hub provided with means forcarrying electrical circuit-connections, an annular track on theexterior of the hub, a case carrying the arms for the lamps andcircuit-connections of the structure, and the annular track secured to.

neck 4, concave track k, balls 70, concave track t, rim t, case 8, andarms 8.

4. In combination with an electrolier, a block of insulating materialsecured within the fixed portion of the distributing-box of theelectrolier, the lower surface of the block provided with metallicrings, forming a part of the cir'cuitconneetions of the electrolier, andthe block of insulating material secured within the revolving case,forming a part of the distributing-box, the upper surface of the blockprovided with frictional contact-springs adapted to bear against themetallic rings secured to the block within the fixed portion of thedistributing-box, said contact-springs electrically connected withconductors leading to the lamps. 4

5. In combination with an electrolier, sub stantially as shown anddescribed, theinsulating-block h, standard-nuts f f, metallic rings g g,flat metallic friction-springs Z, metallic rings n, second block ofinsulating material,

0, metallic proj ections p, and electrical conductors 1 and 2. V

6. In combination with an electrolier, a telescopic tube carrying ameans at the upper end thereof adapted to bear against the exteriorsurface of a supporting-tube secured to a hanger, the lower end of thetelescopic tube provided with means for connecting it with thearm-support of the electrolier.

7. In combination with an electrolier, the

telescopic tube to, friction-spring u, not 1;, offset 12', shoulder 3,and union-nut u.

Signed at New York, in the county of New York and State of New York,this 8th day of January, A. D. 1884.

' CHARLES G. PERKINS.

Witnesses:

JOHN A. ELLIs, E. WM. EDWARDS.

